Safety-valve.



G. L, BURLINGAME & P. P. ME NARD.

SAFETY VALVE.

APPLICATION FILED NOV. 6, 1911.

1,039,693. Patented 0@1 ;.1, 1912.

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SAFETY VALVE.

- APPLICATION FILED NOV. 6, 1911,

2 SHEETSSHEET'2.

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valve is to be applied.

UNiT-ED STATES PATENT onnica.

GEORGE L. BURLINGAME AND PHILIP 1?. IENARD, OF CHICAGO, ILLIN 01S SAFETY-VALVE.

Specification of Letters Patent.

Patented Oct. 1., 1312.

Application filed November 6, 1911. Serial No. 658,751.

lb all whom it may concern."

Be it known that we, Gnonon L. BUR- ldENARIb citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Safety-Valves; and we do declare the following to be a, full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in safety valves.

One object of the invention is to pro-- vide a safety valve having an improved means for holding the same in open position and means whereby such holding mechanism is automatically released and the valve permitted to close.

A further object is to provide means whereby the valve holding mechanism may ble manually released to permit the valve to c ose.

\Vith these and other objects in view the invention consists ofucertain' novel features of construction and the combination and arfully described and claimed.

In the accompanying drawings; Figure 1 1s a side view of my improved valverlhg. 2 is a central vertical longitudinal section thereof showing the valve closed; Fig. 3 is an end view; Fig. dis a vertical cross section on the line H of Fig. 2; Fig. 5

. is a detail perspective view of the catch arm and spring catch for holding the valve in open position; Fig. 6 is a similar view of the manually operated catch releasing lever. I

Referring more particularly to the drawings, '1 denotes the casing of our improved Valve, said casing having in its ends. interiorly threaded inlet and discharge openings with which are adapted to be connected the fluid conducting pipes to which'the In the up er side of the casing l is also formed a threaded opening 2 through which access may. be had to the interior of the casing and which is adapted to be normally closed by a screw In the bottom of the casing is ormed a drain opening 4 which is also provided with a plug 5 for closing the same.

Hingedly secured to a supporting lug or the discharge end thereof is a valve operating arm 7 in the outer end of which is formed an aperture 8 with which is engaged a. stud 9 formed on a boss 10 on the -'valve 11. In the stud 9 is formed a threaded socket 12 with which is adapted to be en gaged a clamping screw 13 between the head of which and the outer side of the arm 7 and on the stud 12 is arranged a spacing sleeve 14. By screw'ng the clamping screw 13 into the threaded socket 12 on the post,

the sleeve 14 is forced against the arm 7 and the latter firmly clamped into engagement with the valve as clearly shown in Fig. 2 of the drawings. Arranged on the pivot pin 15 of the hinge joint of the valve operating arm 7 is a coiled valve closing spring 16, said spring being bent midway between its ends to form a loop 17 which is engaged with the inner end of thearm 7. The ends of the spring after forming the 'loop 17 are bent to form the coils of the spring and are then engaged with the bracket or lug 6 whereby the spring is held in position to exert the pressure thereof in the proper direction for forcibly swinging the Valvedownwardly and into engagement with its seat- 11 formed in the valve casing adjacent to the discharge end thereof as shown thus cutting off the flow of or other fluid through the pipe.

The outer end of the pivot pin'lfi of the valve operating arm 7 extends through a packed gland in one side of the valve casing and projects a suitable distance beyond the same as shown. On the outer end of the pin 15 is fixedly secured a crank arm 18 having a right in w ich is secured an inwardly projecting stop pin or stud 19. Pivotally secured to the outer side of the casing is 2. depending catch arm 20 having on its lower end. a right angularly formed holding finger 21 in the outer end of which is arranged a fuse atcaching screw 22 by means of which one end of a fuse 23 is secured to the finger, the opposite end of the fuse being secured by a screw 24 to the adjacent side of the valve casing as clearly shown in Fig. 1 of the drawings. By thus arranging the fuse 23 the arm 20 is normally held or supported in operative position. On the outer side of the arm 20 are formed outwardly projectin tured guide lugs 25 with which is s idably engaged a catch pin 26, said pin having secured thereto near its upper end a stop plate angularly formed outer endaper- 27 between which and the lower lug 25 is arranged a coiled spring 28 the pressure of which is applied to force the catch pin upwardly in position to engage the upper end thereof with the pin or stud 19 on the crank arm 18 whereby the latter is secured to hold the valve in an open position as shown in dotted lines in Fig. 1 of the drawing. On the lower end of the pin 26 is arranged a head 29 the purpose of which will be hereinafterdescribed. By thus constructing and arranging the valve holding mechanism the valve will be held in open position by the fuse Q3 and when said fuse is burned out or broken the arm 20 will swing laterally thus disengaging the upper end of the catch pin 26 from the stop pin or lug 19 on the arm 18 whereupon said arm is released and the spring 16 thus the valve.

In order to permit the valve to be manually closed when desired, we provide a hand operated catch releasing mechanism, said.

mechanism comprising a lever 30 which is pivotally mounted at one end to the outer.

by a spring 31 arranged on andengaged therewith as shown. The upward movement of the lever 30 and the lateral movement of the arm 20 is limited by the stop pin 32 arranged in and projecting from .the outer side of the casing 1 as shown. On the lower side of the lever 30 is formed an apertuiged lug 33 to which is attached one end of. a lever operating rod 34 to whichmay be connected an operating cable -(not shown), but which may extend to any suitable point outside of the building, thus permitting the lever 30 to be actuated and the valve holding mechanism manually released at a distance from the valve. On the lower end of the arm 20 is formed a stop lug 35 which is provided to limit the r'etracting movement of the catch pin 26 by.

the lever 30 when manually operated.

Our improved valve may be em loyed in connection with any fluid conductlng pipes but is particularly designed for use in connection with gas pipes and is intended to be installed in the service pipe between the point where the same enters the building and gas meter. When thus arranged should a ,fire occur near the meter, the fuse 23 will be melted, thus causing the valve to automatically close and by means of the manually operated releasing mechanism and the permitted to forcibly close cable connected therewith the valve may be closed when desired from the outside of the building, said cable preferably being brought out through a suitable pipe or con duit and having its end secured in a box or other suitable support (not shown).

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantagesof the invention as claimed.

Having thus described our invention, what we claim is:

1. In a safety valve, a casing provided with a valve seat,a valve supported in said casing and adapted to be engaged with said seat, a valve operating arm, a pivot pin secured to said arm and adapted to hingedly support the same in said casing, a spring engaged with said arm and adapted to forcibly close the valve, a crank arm fixedly mounted on one end of said pivot pin, a pivotally mounted catch arm, a catch carried thereby and adapted to engage said crank arm whereby the latter is secured to hold the valve in an open position, a fuse connected with said catch arm and adapted to hold the latter in position to engage the catch there on with said crank arm and whereby when said fuse is burned the catch arm will be released and the catch disengaged from said 1 cured to said arm and adapted to hingedly support the same in said casing, a spring engaged with said arm and adapted to forcibly close the "valve, a crank arm fixedly mounted on "one end of said pivot pin, a catch arm pivotally mounted on the casing andhaving a right an a fuse secured to saio finger and to said casing wherebyyth'e catch arm is held in a normal position, a spring projected catch pin arranged on said catch arm, said pin having. its outer end normally engaged with said crank arm'whereby the latter is secured to hold the valve in an open position while said fuse is intact and whereby when said fuse is broken, said catch arm will be released and the catch pin disengaged from larly formed fin gen the crank arm whereupon the valve will close, and 'a manually operated catch pin releasing mechanism. a

3. In a safety valve, 'a-ca-sing provided with a valve seat, a valve supported in said casing and adapted to be engaged with said seat, a valve operating arm, a pivot pin secured to said arm and adapted to hingedly support the/same in said casing, a spring engaged with said arm and. adapted to forci-.

projected catch finger carried by said catch arm and adapted to be engaged with said crank arm whereby the latter is secured to hold the valve in open position, a fusible means to hold said catch arm in position to engage the catch finger thereon with said crank arm and whereby when said fusible element is broken the catch arm will be released and the catch finger automatically disengaged from the crank arm and the valve thus permitted to close, a manually actuated releasing lever having one end engaged with said catch finger whereby the latter may be retracted from engagement with the crank arm thereby releasing the latter and the valve and an operating mechanism connected with said lever.

In testimony whereof we have hereunto set our hands 1n presence of two subscribing.

witnesses.

GEORGE L. BURLINGAMEQ PHILIP P. MENARD.

Witnesses:

JAMES A. LAUER, ZOWA C. PECK.

Copies of this patent may be obtained for live cents each, by addressing the Washington, D. G.

Commissioner of ZPatents, 

